Spiritualism - is it worth it?

Increases your dps with enchanted weapon
Summon pets to help dps, aoe dps and mainly TANK in pve situations
Cripple
Root with chains
Buff your overall defenses (by the way, it is bugged - it should last till cast again and not only 300s)
AoE burst damage
Heal, regen psi, regen mana
Best current crowd control in game (mage spirit - freezes your target every 8 seconds for 3s)
Lots of death effects (mostly not working)

and everything with zero chance of interrupt and very fast cast speed.

Any ideas how to help devs with balance?
Maybe spread the powers towards more skills?
Maybe increase psi cost?
Maybe increase cast time?
Maybe allow interruption like any other cast ability?
Any other idea?
or none of those, I like the way things are.

i hate spiritualism, its a substitute of about other 4-5 skills, costless, really easy to skill up, pratically a build killer because even if u go for a pvp or pve build its a must have......

my idea is the follow:
longer cast time with 100% interrupt (not like sorcery at 50%), and speed up the implementation of "sorcery affinity" weapons, because actually a warmage is IMPOSSIBLE, and we have about 5 school of magic to choice....

Strenght up pet system with more capable pets (with different statistics that allow to tank on pve and attack on pvp and even support with cripple and heal, this shoul lower the spiritualist request in both fields